Skip to Main content Skip to Navigation
Journal articles

Diversity of migration strategies among great frigatebirds populations

Abstract : Migratory behavior varies extensively between bird taxa, from long distance migration to purely sedentary behavior. Variability in migratory behavior also occurs within taxa, where individuals within some species, or even populations, show mixed strategies. The same variability occurs in seabird species. We examined the migratory behavior of distinct populations of great frigatebirds Fregata minor in three distant oceanographic basins. Great frigatebird populations showed extensive variation in post-breeding migratory behavior. Birds from Europa Island (Mozambique Channel) made longdistance migration to numerous distinct roosting sites in the Indian Ocean, New Caledonia birds made shorter distance migrations to roosting sites in the southwestern Pacific Ocean, and Galapagos birds were resident within the archipelago year round. Juvenile birds from Europa Is. and New Caledonia dispersed widely whereas Galapagos juveniles were resident year round. The migratory behavior of Europa Is. and New Caledonia resulted in complete separation of foraging grounds between breeding adults, non-breeding adults, and juveniles, whereas in the Galapagos the overlap was complete. We suggest that population variability in migratory behavior may have arisen because of different environmental conditions at sea, and also depends on the availability of suitable roosting sites on oceanic islands. The results also highlight the capacity of frigatebirds to remain airborne most of the time even outside the breeding season when they have to molt.
Complete list of metadatas

Cited literature [44 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01499443
Contributor : Martine Lacalle <>
Submitted on : Tuesday, July 3, 2018 - 11:10:11 AM
Last modification on : Wednesday, April 1, 2020 - 1:20:20 AM
Document(s) archivé(s) le : Monday, October 1, 2018 - 7:28:34 AM

File

Diversity_of_migration_strateg...
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Citation

Henri Weimerskirch, Philippe Borsa, Sebastian Cruz, Sophie de Grissac, Lionel Gardes, et al.. Diversity of migration strategies among great frigatebirds populations. Journal of Avian Biology, Wiley, 2017, 48 (1), pp.103-113. ⟨10.1111/jav.01330⟩. ⟨hal-01499443⟩

Share

Metrics

Record views

223

Files downloads

215